Cold War Era Armor
The French AMX-30 dated from the sixties. With modifications it served into the eighties.
The British Chieftain was used from the late sixties until the eighties. Outstanding armor and weapon for its day.
The US M60a2 was an innovative design with a 152mm gun/rocket launcher. Too complex to be successful.
The British Scorpion was a very light (9 ton) and fast recon vehicle with a 76mm gun.
The Soviet T-55 and its variants were used by many nations during the cold war years. 100 mm gun.